linux-kernel - spitz: add gpio button support (fixes regression)

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Date:	Tue, 6 Oct 2009 22:09:33 +0200
From:	Pavel Machek <pavel@....cz>
To:	Eric Miao <eric.y.miao@...il.com>, Andrew Morton <akpm@...l.org>
Cc:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Stanislav Brabec <utx@...guin.cz>, rpurdie@...ys.net,
	lenz@...wisc.edu, kernel list <linux-kernel@...r.kernel.org>,
	Dirk@...er-online.de, arminlitzel@....de,
	Cyril Hrubis <metan@....cz>, thommycheck@...il.com,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	dbaryshkov@...il.com, omegamoon@...il.com
Subject: spitz: add gpio button support (fixes regression)


> So what's the conclusion of the patch? Any ACK/NAK or patch needs updating?

Please take this updated version.

---

Spitz switched to generic matrix-gpio keyboard driver in 2.6.32-rc0,
but that means that support for power button and lid switches was
lost. This restores it, using button-gpio code.

Signed-off-by: Pavel Machek <pavel@....cz>

--- linux-rc/arch/arm.ofic/mach-pxa/spitz.c	2009-10-06 13:48:07.000000000 +0200
+++ linux-rc/arch/arm/mach-pxa/spitz.c	2009-10-06 21:17:19.000000000 +0200
@@ -15,6 +15,7 @@
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
 #include <linux/delay.h>
+#include <linux/gpio_keys.h>
 #include <linux/gpio.h>
 #include <linux/leds.h>
 #include <linux/mtd/physmap.h>
@@ -375,6 +377,51 @@
 };
 
 
+static struct gpio_keys_button spitz_gpio_keys[] = {
+	{
+		.type	= EV_KEY,
+		.code	= KEY_SUSPEND,
+		.gpio	= SPITZ_GPIO_ON_KEY,
+		.desc	= "Power button",
+		.wakeup	= 1,
+	},
+	/* Two buttons detecting the LID state */
+	{
+		.type	= EV_SW,
+		.code	= 0,
+		.gpio	= SPITZ_GPIO_SWA,
+		.desc	= "Lid SWA",
+	},
+	{
+		.type	= EV_SW,
+		.code	= 1,
+		.gpio	= SPITZ_GPIO_SWB,
+		.desc	= "Lid SWB",
+	},
+	/* This is for remote control support. Zaurus supports wired
+	   remote on headphones. */
+	{
+		.type	= EV_SW,
+		.code	= 2,
+		.gpio	= SPITZ_GPIO_AK_INT,
+		.desc	= "Wired remote (AK_INT)",
+	},
+};
+
+static struct gpio_keys_platform_data spitz_gpio_keys_platform_data = {
+	.buttons	= spitz_gpio_keys,
+	.nbuttons	= ARRAY_SIZE(spitz_gpio_keys),
+};
+
+static struct platform_device spitz_gpio_keys_device = {
+	.name	= "gpio-keys",
+	.id	= -1,
+	.dev	= {
+		.platform_data	= &spitz_gpio_keys_platform_data,
+	},
+};
+
+
 /*
  * Spitz LEDs
  */
@@ -689,6 +736,7 @@
 static struct platform_device *devices[] __initdata = {
 	&spitzscoop_device,
 	&spitzkbd_device,
+	&spitz_gpio_keys_device,
 	&spitzled_device,
 	&sharpsl_nand_device,
 	&sharpsl_rom_device,


-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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